package com.gomtel.smartdevice.utils;

import android.content.Context;
import android.content.SharedPreferences;
import android.preference.PreferenceManager;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

/**
 * SharedPreferences封装类
 */

@SuppressWarnings("ALL")
public class SPUtil {

    /**
     * 保存在手机里面的文件名
     */
    private static final String FILE_NAME = "share_data";

    private final SharedPreferences sp;

    public SharedPreferences getSp() {
        return sp;
    }

    private SPUtil(SharedPreferences sp) {
        this.sp = sp;
    }

    public static SPUtil getInstance(Context context) {
        SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(context);
        return new SPUtil(sp);
    }

    public static SPUtil getInstance(Context context, String fileName) {
        SharedPreferences sp = context.getSharedPreferences(fileName.trim(), Context.MODE_PRIVATE);
        return new SPUtil(sp);
    }

    //移除操作
    public void remove(String key) {
        sp.edit().remove(key).apply();
    }

    //清空操作
    public void clear() {
        sp.edit().clear().apply();
    }

    /**
     * 保存数据的方法，我们需要拿到保存数据的具体类型，然后根据类型调用不同的保存方法
     *
     * @param context 上下文
     * @param key     key
     * @param object  value
     */
    public static void put(Context context, String key, Object object) {
        SharedPreferences sp = context.getSharedPreferences(FILE_NAME, Context.MODE_PRIVATE);
        SharedPreferences.Editor editor = sp.edit();
        if (object instanceof String) {
            editor.putString(key, (String) object);
        } else if (object instanceof Integer) {
            editor.putInt(key, (Integer) object);
        } else if (object instanceof Boolean) {
            editor.putBoolean(key, (Boolean) object);
        } else if (object instanceof Float) {
            editor.putFloat(key, (Float) object);
        } else if (object instanceof Long) {
            editor.putLong(key, (Long) object);
        } else {
            editor.putString(key, object.toString());
        }
        SharedPreferencesCompat.apply(editor);
    }

    /**
     * 得到保存数据的方法，我们根据默认值得到保存的数据的具体类型，然后调用相对于的方法获取值
     *
     * @param context       上下文
     * @param key           key
     * @param defaultObject 默认value
     * @return value
     */
    public static Object get(Context context, String key, Object defaultObject) {
        SharedPreferences sp = context.getSharedPreferences(FILE_NAME, Context.MODE_PRIVATE);
        if (defaultObject instanceof String) {
            return sp.getString(key, (String) defaultObject);
        } else if (defaultObject instanceof Integer) {
            return sp.getInt(key, (Integer) defaultObject);
        } else if (defaultObject instanceof Boolean) {
            return sp.getBoolean(key, (Boolean) defaultObject);
        } else if (defaultObject instanceof Float) {
            return sp.getFloat(key, (Float) defaultObject);
        } else if (defaultObject instanceof Long) {
            return sp.getLong(key, (Long) defaultObject);
        }
        return null;
    }

    /**
     * 移除某个key值已经对应的值
     *
     * @param context 上下文
     * @param key     key
     */
    public static void remove(Context context, String key) {
        SharedPreferences sp = context.getSharedPreferences(FILE_NAME, Context.MODE_PRIVATE);
        SharedPreferences.Editor editor = sp.edit();
        editor.remove(key);
        SharedPreferencesCompat.apply(editor);
    }

    /**
     * 清除所有数据
     *
     * @param context 上下文
     */
    public static void clear(Context context) {
        SharedPreferences sp = context.getSharedPreferences(FILE_NAME, Context.MODE_PRIVATE);
        SharedPreferences.Editor editor = sp.edit();
        editor.clear();
        SharedPreferencesCompat.apply(editor);
    }

    /**
     * 创建一个解决SharedPreferencesCompat.apply方法的一个兼容类
     *
     * @author hwj
     */
    private static class SharedPreferencesCompat {
        private static final Method sApplyMethod = findApplyMethod();

        /**
         * 反射查找apply的方法
         *
         * @return 方法
         */
        @SuppressWarnings({"unchecked", "rawtypes"})
        private static Method findApplyMethod() {
            try {
                Class clz = SharedPreferences.Editor.class;
                return clz.getMethod("apply");
            } catch (NoSuchMethodException e) {
                e.printStackTrace();
            }
            return null;
        }

        /**
         * 如果找到则使用apply执行，否则使用commit
         */
        public static void apply(SharedPreferences.Editor editor) {
            try {
                if (sApplyMethod != null) {
                    sApplyMethod.invoke(editor);
                    return;
                }
            } catch (IllegalArgumentException | IllegalAccessException | InvocationTargetException e) {
                e.printStackTrace();
            }
            editor.commit();
        }
    }
}
